Forwarding these questions to the KWin and plasma-devel mailing lists.
-------- Forwarded Message -------- Subject: Re: kwin display issue on librem5 Date: Wed, 28 Feb 2018 12:59:39 -0700 From: Heather Ellsworth <heather.ellswo...@puri.sm> To: subd...@gmail.com CC: bhus...@gmail.com, Guido Günther <guido.gunt...@puri.sm>, Nicole Faerber <nicole.faer...@puri.sm> On 02/28/2018 11:53 AM, Heather Ellsworth wrote: > Hi Roman, > > I've been working with Bhushan to get plasma mobile up and running on > our prototype board and we're having an issue displaying the content. > Attached is a photo (display_issue.jpg) showing the issue. > > We can force the software framebuffer (export KWIN_COMPOSE=Q) to get > proper rendering (good_display_forced_framebuffer.jpg) but we don't want > to force this. > > Guido pointed me to a helpful article: > https://blog.martin-graesslin.com/blog/2016/07/why-does-kwin_wayland-not-start/ > > I tried the various tests suggested in that article and the nested setup > works fine, there are no fatal errors, and trying on the tty worked ok. > I should mention that in both the nested setup and trying on the tty, > the mouse is not visible but is active because i can click the drop down > menus and whatnot, I just can't see where the cursor is. > It is also worth mentioning that I also tried the following troubleshooting steps: 1. No kwin_wayland session running 2. Get the dbus environment: $ env | grep DBUS > /tmp/env $ cat /tmp/env DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-haU84sg3bb,guid=12152191bb2d258c5030793e5a97015f DBUS_SESSION_BUS_PID=1268 3. In an ssh session to the board, export the vars: $ export DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-haU84sg3bb,guid=12152191bb2d258c5030793e5a97015f $ export DBUS_SESSION_BUS_PID=1268 4. In a tty on the board, launch kwin_wayland: $ kwin_wayland --drm plasma-phone 5. In an ssh session to the board: $ qdbus org.kde.KWin /KWin supportInformation The qdbus command pretty quickly causes the kwin_wayland to crash with a seg fault: Segementation fault (core dumped)d the Wayland compositor die?1-HP W2371d/6CM2140D0D") "HDMI-A-1-HP W2371d/6CM2140D0D"ty "GlobalDnsConfiguration"d"e"/usr/share/kservicetypes5/kwineffect.desktop" In journalctl, we see a piece of the stacktrace but not much: Feb 28 19:34:05 pureos org.kde.ActivityManager[1268]: The Wayland connection broke. Did the Wayland compositor die? Feb 28 19:34:05 pureos org.kde.ActivityManager[1268]: Closing SQL connection: "kactivities_db_resources_3069980688_readwrite" Feb 28 19:34:17 pureos systemd-coredump[1627]: Process 1572 (kwin_wayland) of user 1000 dumped core. Stack trace of thread 1572: #0 0x00000000b6e5a964 n/a (libkwin.so.5) Feb 28 19:34:18 pureos kernel: PM: Removing info for No Bus:sit0 Feb 28 19:34:18 pureos kernel: PM: Removing info for No Bus:lo Feb 28 19:36:12 pureos kernel: wlcore: down > That article also mentions running kwin on weird systems and I guess our > dev board counts :) > > So my questions for you are: > * Do you have any idea what could be missing or causing the > display_issue.jpg that could be fixed by exporting KWIN_COMPOSE? > * Do you know how to make the mouse cursor show up? > > Also if there's a better place to ask this (like a kwin irc or mailing > list), I'm happy to redirect my questions. Once again, thanks for your > time on this project. > > Cheers, > Heather >
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